Browsing by Author "Reger, Michael K."

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    Association between Urinary Phytoestrogens and C-reactive Protein in the Continuous National Health and Nutrition Examination Survey
    (Taylor & Francis, 2017) Reger, Michael K.; Zollinger, Terrell W.; Liu, Ziyue; Jones, Josette; Zhang, Jianjun; Epidemiology, School of Public Health
    Objective: A reduced risk of some cancers and cardiovascular disease associated with phytoestrogen intake may be mediated through its effect on serum C-reactive protein (CRP; an inflammation biomarker). Therefore, this study examined the associations between urinary phytoestrogens and serum CRP. Methods: Urinary phytoestrogen and serum CRP data obtained from 6009 participants aged ≥ 40 years in the continuous National Health and Nutrition Examination Survey during 1999–2010 were analyzed. Results: After adjustment for confounders, urinary concentrations of total and all individual phytoestrogens were inversely associated with serum concentrations of CRP (all p < 0.004). The largest reductions in serum CRP (mg/L) per interquartile range increase in urinary phytoestrogens (ng/mL) were observed for total phytoestrogens (β = −0.18; 95% confidence interval [CI], −0.22, −0.15), total lignan (β = −0.15; 95% CI, −0.18, −0.12), and enterolactone (β = −0.15; 95% CI, −0.19, −0.12). A decreased risk of having high CRP concentrations (≥3.0 mg/L) for quartile 4 vs quartile 1 was also found for total phytoestrogens (OR = 0.63; 95% CI, 0.53, 0.73), total lignan (OR = 0.64; 95% CI, 0.54, 0.75), and enterolactone (OR = 0.59; 95% CI, 0.51, 0.69). Conclusion: Urinary total and individual phytoestrogens were significantly inversely associated with serum CRP in a nationally representative sample of the U.S. population.
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    Associations between Intake of Calcium, Magnesium, and Phosphorus and Risk of Pancreatic Cancer: A Population-Based, Case-Control Study in Minnesota
    (Cambridge UP, 2021) Fan, Hao; Yu, Yunpeng; Nan, Haocheng; Hoyt, Margaret; Reger, Michael K.; Prizment, Anna; Anderson, Kristin E.; Zhang, Jianjun; Epidemiology, School of Public Health
    Experimental studies suggest that abnormal levels of calcium, magnesium, and phosphorus are implicated in pancreatic carcinogenesis. We investigated the associations between intakes of these minerals and the risk of pancreatic cancer in a case-control study conducted in 1994-1998. Cases of pancreatic cancer (n150) were recruited from all hospitals in the metropolitan area of the Twin Cities and Mayo Clinic, Minnesota. Controls (n459) were randomly selected from the general population and frequency matched to cases by age, sex, and race. All dietary variables were adjusted for energy intake using the residual method prior to data analysis. Logistic regression was performed to evaluate the associations between intake of three nutrients examined and the risk of pancreatic cancer. Total intake of calcium (936 vs. 1026 mg/day) and dietary intake of magnesium (315 vs. 331 mg/day) and phosphorus (1350 vs. 1402 mg/day) were significantly lower in cases than in controls. After adjustment for confounders, there were not significant associations of total and dietary intakes of calcium, magnesium, and phosphorus with the risk of pancreatic cancer. In addition, no significant interactions exist between intakes of these minerals and total fat on pancreatic cancer risk. In conclusion, the present study does not suggest that intakes of calcium, magnesium, and phosphorus were significantly associated with the risk of pancreatic cancer.
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    Dietary intake of isoflavones and coumestrol and the risk of prostate cancer in the Prostate, Lung, Colorectal and Ovarian Cancer Screening Trial
    (Wiley, 2018-02) Reger, Michael K.; Zollinger, Terrell W.; Liu, Ziyue; Jones, Josette F.; Zhang, Jianjun; Epidemiology, School of Public Health
    Experimental studies have revealed that phytoestrogens may modulate the risk of certain sites of cancer due to their structural similarity to 17β‐estradiol. The present study investigates whether intake of these compounds may influence prostate cancer risk in human populations. During a median follow up of 11.5 years, 2,598 cases of prostate cancer (including 287 advanced cases) have been identified among 27,004 men in the intervention arm of the Prostate, Lung, Colorectal and Ovarian Cancer Screening Trial. Dietary intake of phytoestrogens (excluding lignans) was assessed with a food frequency questionnaire. Cox proportional hazards regression analysis was performed to estimate hazard ratios (HRs) and 95% confidence intervals (CI) for dietary isoflavones and coumestrol in relation to prostate cancer risk. After adjustment for confounders, an increased risk of advanced prostate cancer [HR (95% CI) for quintile (Q) 5 vs. Q1] was found for the dietary intake of total isoflavones [1.91 (1.25–2.92)], genistein [1.51 (1.02–2.22), daidzein [1.80 (1.18–2.75) and glycitein [1.67 (1.15–2.43)] (p‐trend for all associations ≤0.05). For example, HR (95% CI) for comparing the Q2, Q3, Q4 and Q5 with Q1 of daidzein intake was 1.45 (0.93–2.25), 1.65 (1.07–2.54), 1.73 (1.13–2.66) and 1.80 (1.18–2.75), respectively (p‐trend: 0.013). No statistically significant associations were observed between the intake of total isoflavones and individual phytoestrogens and non‐advanced and total prostate cancer after adjustment for confounders. This study revealed that dietary intake of isoflavones was associated with an elevated risk of advanced prostate cancer.
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    Indiana Registered Nurse 2007 Re-Licensure Survey Report
    (2010-01) Zollinger, Terrell W.; Kochhar, Komal; Reger, Michael K.; Alyea, Jennifer M.
    The registered nurse re-licensure survey is implemented through a collaboration of the Indiana State Department of Health (ISDH) and the Indiana Professional Licensing Agency (IPLA). This report summarizes the responses to the 2007 Indian a registered nurse re-licensure survey and compares them to the results of the prior registered nurse re-licensure surveys reported in the Indiana Registered Nurse Survey Databook, 1997 and 2001 and the 2005 Indiana Registered Nurse Re-Licensure Survey Report.
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    Report of Responses to the 2003, 2005 and 2007 Indiana Physician Surveys
    (2009-04) Allen, Deborah I.; Zollinger, Terrell W.; Kochhar, Komal; Reger, Michael K.; Chowdhury, Shabnam
    A variety of survey methods have been used since the 1970’s to learn more about the physician supply and distribution in the state of Indiana. Since 1997, a voluntary survey instrument has been attached to the physician license renewal form, which physicians complete every 2 years. Those renewing their licenses online in 2003, 2005 and 2007 were invited to complete the survey. Those renewing their license through the mail were not given the opportunity to complete the survey. The physician survey was implemented through a collaboration of the Indiana State Department of Health (ISDH) and the Indiana Professional Licensing Agency (IPLA). This report summarizes the responses to the 2003, 2005 and 2007 Indiana Physician Surveys and compares these results to the results of the prior physician surveys reported in the Indiana Physician Survey Databook, 1997 and the Indiana Physician Survey Databook, 2001.
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    Urinary phytoestrogens and cancer, cardiovascular, and all-cause mortality in the continuous National Health and Nutrition Examination Survey
    (Springer, 2015-05) Reger, Michael K.; Zollinger, Terrell W.; Liu, Ziyue; Jones, Josette; Zhang, Jianjun; Department of Epidemiology, Richard M. Fairbanks School of Public Health
    Purpose Experimental studies suggest that phytoestrogen intake alters cancer and cardiovascular risk. This study investigated the associations of urinary phytoestrogens with total cancer (n = 79), cardiovascular (n = 108), and all-cause (n = 290) mortality among 5179 participants in the continuous National Health and Nutrition Examination Survey (1999–2004). Methods Urinary phytoestrogens were measured using high-performance liquid chromatography with tandem mass spectrometric detection. Survival analysis was performed to evaluate hazard ratios (HRs) and 95 % confidence intervals (CIs) for each of the three outcomes in relation to urinary phytoestrogens. Results After adjustment for confounders, higher urinary concentrations of total enterolignans were associated with a reduced risk of death from cardiovascular disease (HR for tertile 3 vs. tertile 1 0.48; 95 % CI 0.24, 0.97), whereas higher urinary concentrations of total isoflavones (HR for tertile 3 vs. tertile 1 2.14; 95 % CI 1.03, 4.47) and daidzein (HR for tertile 3 vs. tertile 1 2.05; 95 % CI 1.02, 4.11) were associated with an increased risk. A reduction in all-cause mortality was observed for elevated urinary concentrations of total enterolignans (HR for tertile 3 vs. tertile 1 0.65; 95 % CI 0.43, 0.96) and enterolactone (HR for tertile 3 vs. tertile 1 0.65; 95 % CI 0.44, 0.97). Conclusions Some urinary phytoestrogens were associated with cardiovascular and all-cause mortality in a representative sample of the US population. This is one of the first studies that used urinary phytoestrogens as biomarkers of their dietary intake to evaluate the effect of these bioactive compounds on the risk of death from cancer and cardiovascular disease.